Hi guys looking for an answer re frozen pipes.

dad in laws house lying vacant at the moment (hospitalised) and just
realised after my wife had been down, she turned the elec off, meaning the
central heating will not have been working over the last week of the cold
spell (minus 6) So good likely hood of frozen pipes. Hopefully not burst but
possibility.

My intention is to turn the water off at the mains, as I am to far distant
to go back and forth to keep an eye on it.
Is it best (assuming nothing burst) to turn off at the main and leave the
taps open to ease expansion?

Any ideas.